TreeLine: Outliner meets free-form database (Linux.com)

Linux.com takes a look at the Treeline outliner. "TreeLine is a hybrid application that combines the features of a traditional outliner with a free-form database. As such, it offers a unique way to organize heterogeneous data, be it contact information, bookmarks, text snippets, bibliography, task lists, or something else. Moreover, using TreeLine's outlining capabilities you can easily group and manage the mixed data inside the database."